<template>
  <div class="about">
    <!-- 当 id 存在时 为编辑 否则是 新建 -->
    <h1>{{id ? "编辑" : "新建"}}广告位</h1>
    <el-form label-width="120px" @submit.native.prevent="save">
      <el-form-item label="名称">
        <el-input v-model="model.title"></el-input>
      </el-form-item>

      <el-form-item label="广告">
        <el-button @click="model.items.push({})">
          <i class="el-icon-plus">添加广告</i>
        </el-button>
        <el-row type="flex" style="flex-wrap:wrap">
          <el-col :md="24" v-for="(item,i) in model.items" :key="i">
            <el-form-item label="跳转链接">
              <el-input v-model="item.url" style="width:60%"></el-input>
            </el-form-item>

            <el-form-item label="图片" style="margin-top:1rem">
              <el-upload
                class="avatar-uploader"
                :action="$http.defaults.baseURL + '/upload' "
                :show-file-list="false"
                :on-success="res =>$set(item , 'image', res.url)"
              >
                <img v-if="item.image" :src="item.image" class="avatar"  />
                <i v-else class="el-icon-plus avatar-uploader-icon"></i>
              </el-upload>
            </el-form-item>

            <el-button
              @click="model.items.splice(i,1)"
              style="margin-left: 15rem;margin-bottom: 1rem;"
              size="small"
              type="danger"
            >删除</el-button>
          </el-col>
        </el-row>
      </el-form-item>

      <el-form-item>
        <el-button type="primary" native-type="submit">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  // 获取路由里传过来的 需要编辑的 分类的 id
  props: {
    id: {}
  },
  data() {
    return {
      model: {
        items: []
      }
    };
  },
  created() {
    //   当 id 存在时 触发 fetch 函数
    this.id && this.fetch();
  },
  methods: {
    // afterUpload(res){
    //   this.$set(this.model, "icon", res.url)
    //   // this.model.icon = res.url
    //   console.log(res)
    // },
    async save() {
      let res;
      if (this.id) {
        res = await this.$http.put(`/rest/ads/${this.id}`, this.model);
      } else {
        res = await this.$http.post("/rest/ads", this.model);
      }
      this.$router.push("/ads/list");
      console.log(res);
      this.$message({
        type: "success",
        message: "保存成功"
      });
    },
    async fetch() {
      const res = await this.$http.get(`/rest/ads/${this.id}`);
      this.model = Object.assign({}, this.model, res.data);
      console.log(res.data);
    }
  }
};
</script>

<style >
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.avatar-uploader .el-upload:hover {
  border-color: #409eff;
}
.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}
.avatar {
  width: auto;
  height: 178px;
  display: block;
}
</style>